Radio Frequency Noise Management

1. A method for a near field communication (NFC) device to control one or more clock signals to reduce interference with NFC signals, comprising: generating, by a clock source of the NFC device, a clock source signal; receiving, at a clock management unit of the NFC device, the clock source signal; generating, by the clock management unit of the NFC device, a plurality of clock signals, wherein a switching regulator clock signal of the plurality of clock signals has a first phase and a first frequency, wherein a NFC clock signal of the plurality of clock signals has a second phase and a second frequency, and wherein a processing unit clock signal of the plurality of clock signals has a third phase and a third frequency; receiving, by one or more switching regulators of the NFC device, the switching regulator clock signal, wherein the one or more switching regulators emit RF noise based on the first phase and first frequency; receiving, by a processing unit of the NFC device, the NFC clock signal, wherein a transmitted NFC carrier signal is based on the second phase and the second frequency; receiving, by a receive circuit of the NFC device, a received NFC signal, wherein the received NFC signal is based on the NFC carrier signal, and wherein the received NFC signal includes the RF noise; receiving, by the processing unit, the processing unit clock signal, wherein a plurality of possible sampling times for the received NFC signal is based on the third phase and the third frequency; determining, by the processing unit, a first phase difference between the first phase of the switching regulator clock signal and the second phase of the NFC clock signal; determining, by the processing unit, a first frequency difference between the first frequency of the switching regulator clock signal and the second frequency of the NFC clock signal; identifying, by the processing unit, a plurality of sampling times based on the first phase difference and the first frequency difference; and sampling, by the processing unit, the NFC signal at the plurality of sampling times.

2. The method of claim 1 , further comprising: determining, at the processing unit, a phase of the RF noise; determining, at the processing unit, a phase offset between the phase of the RF noise and the second phase of the NFC clock signal; providing, by the processing unit, a signal to the clock management unit indicative of the phase offset; and modifying, at the clock management unit, the plurality of clock signals based on the phase offset, wherein the first phase, the second phase, and third phase are modified based on the phase offset.

3. The method of claim 2 , wherein the phase offset is based on the first phase difference.

4. The method of claim 1 , wherein the first frequency and the second frequency are selected such that harmonics of the first frequency do not interfere with the second frequency.

5. The method of claim 1 , further comprising: providing, by the processing unit, a control signal to one or more programmable noise filters based on the first phase difference and first frequency difference, wherein the control signal modifies a filtering parameter of the one or more programmable noise filters; and filtering, by the one or more programmable noise filters, the RF noise of the received NFC signal.

6. A method for a wireless communication device to control one or more clock signals to optimize the communication of wireless signals, comprising: generating, by a clock source of the wireless communication device, a clock source signal; receiving, at a clock management unit of the wireless communication device, the clock source signal; generating, by the clock management unit of the wireless communication device, a plurality of clock signals, wherein a noise source clock signal of the plurality of clock signals has a first phase and a first frequency and wherein a wireless clock signal of the plurality of clock signals has a second phase and a second frequency; receiving, by a noise source of the wireless communication device, the noise source clock signal, wherein the noise source emits RF noise based on the first phase and the first frequency; receiving, by a wireless source of the wireless communication device, the wireless clock signal; communicating, by the wireless source of the wireless communication device, a wireless signal based on the second phase and the second frequency; comparing, by the wireless communication device, the RF noise with the communicated wireless signal; and modifying, by the clock management unit, the first phase or the first frequency based on the comparing.

7. The method of claim 6 , wherein the wireless communication device comprises a near field communication (NFC) device, the wireless source comprises a NFC source, and the communicated wireless signal comprises a NFC signal.

8. The method of claim 7 , wherein the comparing is based on a phase of the RF noise and a phase of the NFC signal.

9. The method of claim 7 , further comprising receiving, by the NFC source, a modulated version of the NFC signal, wherein the comparing is based on a phase of the RF noise and a phase of the modulated version of the NFC signal.

10. The method of claim 6 , wherein the noise source comprises a switching regulator.

11. The method of claim 6 , wherein a processing unit clock signal of the plurality of clock signals has a third phase and a third frequency, and wherein a sampling time of a processing unit for the wireless signal is based on the comparing, the third phase, and the third frequency.

12. The method of claim 11 , further comprising modifying, by the clock management unit, the third phase or the third frequency based on the comparing.

13. The method of claim 6 , further comprising: determining, by the wireless communication device, a phase of the RF noise; and determining, by the wireless communication device, a phase of the wireless signal, wherein the comparing is based on the comparison of the phase of the RF noise and the phase of the wireless signal.

14. The method of claim 6 , wherein the first frequency and the second frequency are selected such that harmonics of the first frequency do not interfere with the second frequency.

15. The method of claim 6 , further comprising: providing, by the wireless communication device, a control signal to one or more programmable noise filters of the wireless communication device based on the comparing, wherein the control signal modifies a filtering parameter of the one or more programmable noise filters; and filtering, by the one or more programmable noise filters, the RF noise.

16. A wireless communication device for controlling one or more clock signals to optimize the communication of wireless signals, comprising: a clock source configured to generate a clock source signal; a clock management unit configured to receive the clock source signal configured to generate a plurality of clock signals, wherein a noise source clock signal of the plurality of clock signals has a first phase and a first frequency and wherein a wireless clock signal of the plurality of clock signals has a second phase and a second frequency; a noise source configured to receive the noise source clock signal, wherein the noise source emits RF noise based on the first phase and the first frequency; and a wireless source configured to receive the wireless clock signal, wherein the wireless source is configured to communicate a wireless signal based on the second phase and the second frequency, wherein the wireless communication device is configured to compare the RF noise and the communicated wireless signal, and wherein the clock management unit is further configured to modify the first phase or the first frequency based on the comparison.

17. The device of claim 16 , wherein the wireless communication device comprises a near field communication (NFC) device, the wireless source comprises a NFC source, and the communicated wireless signal comprises a NFC signal.

18. The device of claim 17 , wherein the wireless communication device is configured to compare a phase of the RF noise with a phase of the NFC signal.

19. The device of claim 17 , further comprising receiving, by the NFC source, a modulated version of the NFC signal, wherein the comparing is based on a phase of the RF noise and a phase of the modulated version of the NFC signal.

20. The device of claim 16 , wherein the noise source comprises a switching regulator.

21. The device of claim 16 , wherein a processing unit clock signal of the plurality of clock signals has a third phase and a third frequency, and wherein a sampling time of a processing unit for the wireless signal is based on the comparing, the third phase, and the third frequency.

22. The device of claim 21 , wherein the clock management unit is further configured to modify the third phase or the third frequency based on the comparison of the RF noise and the communicated wireless signal by the wireless communication device.

23. The device of claim 16 , wherein the wireless communication device is further configured to determine a phase of the RF noise and a phase of the wireless signal, and wherein the wireless communication device is further configured to compare the phase of the RF noise and the phase of the wireless signal.

24. The device of claim 16 , wherein the first frequency and the second frequency are selected such that harmonics of the first frequency do not interfere with the second frequency.

25. The device of claim 16 , wherein the wireless communication device is further configured to provide a control signal to one or more programmable noise filters of the wireless communication device based on the comparison of the RF noise and the communicated wireless signal, wherein the control signal modifies a filtering parameter of the one or more programmable noise filters, and wherein the one or more programmable noise filters is configured to filter the RF noise.

26. A non-transitory computer-readable storage medium comprising instructions stored therein, which when executed by one or more processors, cause the one or more processing units to perform operations comprising: generating a clock source signal by a clock source of a wireless communication device; receiving the clock source signal at a clock management unit of the wireless communication device; generating a plurality of clock signals by the clock management unit, wherein a noise source clock signal of the plurality of clock signals has a first phase and a first frequency and wherein a wireless clock signal of the plurality of clock signals has a second phase and a second frequency; receiving the noise source clock signal by a noise source of the wireless communication device, wherein the noise source of the wireless communication device emits RF noise based on the first phase and the first frequency; receiving the wireless clock signal by a wireless source of the wireless communication device; communicating a wireless signal by the wireless source of the wireless communication device based on the second phase and the second frequency; comparing the RF noise with the communicated wireless signal; and modifying the first phase or the first frequency based on the comparing.

27. The non-transitory computer-readable storage medium of claim 26 , wherein the wireless communication device comprises a near field communication (NFC) device, the wireless source comprises a NFC source, and the communicated wireless signal comprises a NFC signal.

28. The non-transitory computer-readable storage medium of claim 27 , wherein the comparison of the RF noise with the communicated wireless signal is based on a phase of the RF noise and a phase of the NFC signal.

29. The non-transitory computer-readable storage medium of claim 27 , wherein the instructions further comprise instructions that cause the one or more processors to perform operations comprising: receiving a modulated version of the NFC signal by the NFC source, wherein the comparison of the RF noise with the communicated wireless signal is based on a phase of the RF noise and a phase of the modulated version of the NFC signal.

30. The non-transitory computer-readable storage medium of claim 26 , wherein the first frequency and the second frequency are selected such that harmonics of the first frequency do not interfere with the second frequency.

31. A device for communicating RF signals, comprising: a clock source configured to generate a clock source signal; a clock management unit configured to receive the clock source signal and configured to generate a plurality of clock signals, wherein a noise source clock signal of the plurality of clock signals has a phase and a frequency; a noise source configured to receive the noise source clock signal, wherein the noise source emits RF noise based on the first phase and the first frequency; and a circuit configured to communicate an RF signal, wherein the device is configured to determine at least one value indicating an extent to which the RF noise interferes with the RF signal, and wherein the clock management unit is further configured to modify the phase or the frequency based on the at least one value.

32. The device of claim 31 , wherein the device is configured to determine the at least one value by comparing the RF noise and the RF signal.

33. The device of claim 31 , wherein the device is configured to compare the at least one value to a threshold and to determine whether to modify the first phase or the first frequency based on a comparison of the at least one value to the threshold.

34. The device of claim 31 , wherein the RF signal is a wireless signal.